diff --git a/curriculum/challenges/english/blocks/en-b1-quiz-conditionals/696043ed5bea9c7152b6e699.md b/curriculum/challenges/english/blocks/en-b1-quiz-conditionals/696043ed5bea9c7152b6e699.md
index 03238a89eb9..b093f7d46f5 100644
--- a/curriculum/challenges/english/blocks/en-b1-quiz-conditionals/696043ed5bea9c7152b6e699.md
+++ b/curriculum/challenges/english/blocks/en-b1-quiz-conditionals/696043ed5bea9c7152b6e699.md
@@ -74,8 +74,8 @@ Listen to the audio. What does Mark express? <!-- (quiz audio) Mark: If the powe
 {
   "audio": {
     "filename": "B1_7-1.mp3",
-    "startTimestamp": 4.6,
-    "finishTimestamp": 7.8
+    "startTimestamp": 4.8,
+    "finishTimestamp": 7.95
   },
   "transcript": [
     {
diff --git a/curriculum/challenges/english/blocks/en-b1-quiz-describe-places-events/69604103d290e1c4131ab27b.md b/curriculum/challenges/english/blocks/en-b1-quiz-describe-places-events/69604103d290e1c4131ab27b.md
index d76eaa4e001..2e3207733e0 100644
--- a/curriculum/challenges/english/blocks/en-b1-quiz-describe-places-events/69604103d290e1c4131ab27b.md
+++ b/curriculum/challenges/english/blocks/en-b1-quiz-describe-places-events/69604103d290e1c4131ab27b.md
@@ -74,8 +74,8 @@ Listen to the audio. Which of the following is NOT an appropriate answer? <!-- (
 {
   "audio": {
     "filename": "B1_1-3.mp3",
-    "startTimestamp": 0,
-    "finishTimestamp": 1.7
+    "startTimestamp": 0.2,
+    "finishTimestamp": 1.9
   },
   "transcript": [
     {
@@ -334,8 +334,8 @@ Listen to the audio. How would you answer this question? <!-- (quiz audio) Anna:
 {
   "audio": {
     "filename": "B1_1-2.mp3",
-    "startTimestamp": 21,
-    "finishTimestamp": 23
+    "startTimestamp": 21.2,
+    "finishTimestamp": 23.2
   },
   "transcript": [
     {
diff --git a/curriculum/challenges/english/blocks/en-b1-quiz-express-concerns/69604533db80dd47ad2b3ca0.md b/curriculum/challenges/english/blocks/en-b1-quiz-express-concerns/69604533db80dd47ad2b3ca0.md
index 54cc4dfc5ec..72a68b861bf 100644
--- a/curriculum/challenges/english/blocks/en-b1-quiz-express-concerns/69604533db80dd47ad2b3ca0.md
+++ b/curriculum/challenges/english/blocks/en-b1-quiz-express-concerns/69604533db80dd47ad2b3ca0.md
@@ -418,8 +418,8 @@ Listen to the audio. What does Maria mention about the deadline? <!-- (quiz audi
 {
   "audio": {
     "filename": "B1_12-3.mp3",
-    "startTimestamp": 5.5,
-    "finishTimestamp": 8.7
+    "startTimestamp": 5.7,
+    "finishTimestamp": 8.76
   },
   "transcript": [
     {
diff --git a/curriculum/challenges/english/blocks/en-b1-quiz-future-continuous-actions/696043b2bbd5b82007ef893d.md b/curriculum/challenges/english/blocks/en-b1-quiz-future-continuous-actions/696043b2bbd5b82007ef893d.md
index a873dbaa506..eff16aa760c 100644
--- a/curriculum/challenges/english/blocks/en-b1-quiz-future-continuous-actions/696043b2bbd5b82007ef893d.md
+++ b/curriculum/challenges/english/blocks/en-b1-quiz-future-continuous-actions/696043b2bbd5b82007ef893d.md
@@ -26,7 +26,7 @@ Which of the following sentences describes someone's intention?
 
 #### --distractors--
 
-`I will review the security policy tomorrow.`
+`I have reviewed the security policy by tomorrow.`
 
 ---
 
diff --git a/curriculum/challenges/english/blocks/en-b1-quiz-past-activities/696042e15a349be2f4a4579a.md b/curriculum/challenges/english/blocks/en-b1-quiz-past-activities/696042e15a349be2f4a4579a.md
index fc82b229a33..037ebccf0cd 100644
--- a/curriculum/challenges/english/blocks/en-b1-quiz-past-activities/696042e15a349be2f4a4579a.md
+++ b/curriculum/challenges/english/blocks/en-b1-quiz-past-activities/696042e15a349be2f4a4579a.md
@@ -74,8 +74,8 @@ Listen to the audio. How would you answer this question? <!-- (quiz audio) James
 {
   "audio": {
     "filename": "B1_3-1.mp3",
-    "startTimestamp": 14,
-    "finishTimestamp": 16.2
+    "startTimestamp": 14.2,
+    "finishTimestamp": 16.4
   },
   "transcript": [
     {
@@ -282,7 +282,7 @@ Which of the following means to make a decision about something?
 
 #### --distractors--
 
-`To decide about`
+`To decide out`
 
 ---
 
diff --git a/curriculum/challenges/english/blocks/en-b1-quiz-past-experiences/6960415647143b144f20b94d.md b/curriculum/challenges/english/blocks/en-b1-quiz-past-experiences/6960415647143b144f20b94d.md
index dbe75c6de8f..37741b2d06d 100644
--- a/curriculum/challenges/english/blocks/en-b1-quiz-past-experiences/6960415647143b144f20b94d.md
+++ b/curriculum/challenges/english/blocks/en-b1-quiz-past-experiences/6960415647143b144f20b94d.md
@@ -74,8 +74,8 @@ Listen to the audio. How would you answer this question? <!-- (quiz audio) Lisa:
 {
   "audio": {
     "filename": "B1_2-1.mp3",
-    "startTimestamp": 0,
-    "finishTimestamp": 2.8
+    "startTimestamp": 0.2,
+    "finishTimestamp": 3
   },
   "transcript": [
     {
@@ -312,8 +312,8 @@ Listen to the audio. What is asked with this question? <!-- (quiz audio) Jake: W
 {
   "audio": {
     "filename": "B1_2-2.mp3",
-    "startTimestamp": 8.4,
-    "finishTimestamp": 9.5
+    "startTimestamp": 8.6,
+    "finishTimestamp": 9.7
   },
   "transcript": [
     {
diff --git a/curriculum/challenges/english/blocks/en-b1-quiz-plan-future-events/696043687613cbc3f7df2413.md b/curriculum/challenges/english/blocks/en-b1-quiz-plan-future-events/696043687613cbc3f7df2413.md
index 56035c4c2a8..b1a6e73abb3 100644
--- a/curriculum/challenges/english/blocks/en-b1-quiz-plan-future-events/696043687613cbc3f7df2413.md
+++ b/curriculum/challenges/english/blocks/en-b1-quiz-plan-future-events/696043687613cbc3f7df2413.md
@@ -22,7 +22,7 @@ Read each question and choose the correct answer. There's only one correct answe
 
 #### --text--
 
-Which sentence correctly talks about a planned meeting?
+Which sentence correctly talks about a planned event?
 
 #### --distractors--
 
@@ -30,7 +30,7 @@ Which sentence correctly talks about a planned meeting?
 
 ---
 
-`The project was scheduled for next week.`
+`The project has scheduled for next week.`
 
 ---
 
diff --git a/curriculum/challenges/english/blocks/en-b1-quiz-present-perfect-accessibility/696043202e8e8cbd72c2de1b.md b/curriculum/challenges/english/blocks/en-b1-quiz-present-perfect-accessibility/696043202e8e8cbd72c2de1b.md
index f120f7e1fe8..907071a4af9 100644
--- a/curriculum/challenges/english/blocks/en-b1-quiz-present-perfect-accessibility/696043202e8e8cbd72c2de1b.md
+++ b/curriculum/challenges/english/blocks/en-b1-quiz-present-perfect-accessibility/696043202e8e8cbd72c2de1b.md
@@ -38,7 +38,7 @@ A device used to scan printed documents
 
 #### --answer--
 
-A software tool that reads text on a device aloud
+A software tool that reads text aloud on a device
 
 ### --question--
 
@@ -440,8 +440,8 @@ Listen to the audio. What does it suggest about the results? <!-- (quiz audio) J
 {
   "audio": {
     "filename": "B1_4-4.mp3",
-    "startTimestamp": 28.5,
-    "finishTimestamp": 32.3
+    "startTimestamp": 28.7,
+    "finishTimestamp": 32.5
   },
   "transcript": [
     {
diff --git a/curriculum/challenges/english/blocks/en-b1-quiz-share-feedback/6960442c33cde51b9c78d980.md b/curriculum/challenges/english/blocks/en-b1-quiz-share-feedback/6960442c33cde51b9c78d980.md
index ac1223b10db..2345221720b 100644
--- a/curriculum/challenges/english/blocks/en-b1-quiz-share-feedback/6960442c33cde51b9c78d980.md
+++ b/curriculum/challenges/english/blocks/en-b1-quiz-share-feedback/6960442c33cde51b9c78d980.md
@@ -291,7 +291,7 @@ Listen to the audio. What is Brian communicating? <!-- (quiz audio) Brian: True.
   "audio": {
     "filename": "B1_8-2.mp3",
     "startTimestamp": 26,
-    "finishTimestamp": 31.5
+    "finishTimestamp": 31.7
   },
   "transcript": [
     {
diff --git a/curriculum/challenges/english/blocks/en-b1-quiz-share-opinions/69604468bd3c7564baa4746e.md b/curriculum/challenges/english/blocks/en-b1-quiz-share-opinions/69604468bd3c7564baa4746e.md
index 357adb25904..cd80da31e18 100644
--- a/curriculum/challenges/english/blocks/en-b1-quiz-share-opinions/69604468bd3c7564baa4746e.md
+++ b/curriculum/challenges/english/blocks/en-b1-quiz-share-opinions/69604468bd3c7564baa4746e.md
@@ -397,7 +397,7 @@ Listen to the audio. What does Maria ask about? <!-- (quiz audio) Maria: We need
   "audio": {
     "filename": "B1_9-2.mp3",
     "startTimestamp": 0,
-    "finishTimestamp": 4
+    "finishTimestamp": 4.4
   },
   "transcript": [
     {